/challenges-projects/project14/555timermadness/b/blog/posts/how-to-use-555-timer-ic-for-sensor-interfacing-converting-the-sensor-output-voltage-to-frequencyContents- Blog 1: How to use 555 timer IC for sensor interfacing: Converting the sensor output to frequency Blog 2: How to use 555 timer IC for sensor interfacing: Part-2 Wireless transmission This is my project entry for the 555 timer mad...en-USTelligent Community 12https://community.element14.com/challenges-projects/project14/555timermadness/b/blog/posts/how-to-use-555-timer-ic-for-sensor-interfacing-converting-the-sensor-output-voltage-to-frequencyWed, 20 Mar 2024 16:57:33 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:b9433fd1-3187-44b8-9495-4f43db5a753bAE7HD0<p>I would not use a ceramic 0.01uF capacitor as they tend to be rather temperature sensitive.</p><img src="https://community.element14.com/aggbug?PostID=24525&AppID=388&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/project14/555timermadness/b/blog/posts/how-to-use-555-timer-ic-for-sensor-interfacing-converting-the-sensor-output-voltage-to-frequencyWed, 12 Oct 2022 16:23:48 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:b9433fd1-3187-44b8-9495-4f43db5a753bdang742<p>I like how you are using frequency to represent temperature.&nbsp; Your project gave me an idea... something I might try in the future.&nbsp; I will try and use two 555 timers.&nbsp; One for controlling PW, the other for controlling pulse width.&nbsp; The 555 timer that controls pulse width will have a thermistor.&nbsp; When the temperature is cool the pulse width will exceed the period resulting in a DC voltage and no sound.&nbsp; As the thermistor heats duty cycle and volume should increase, at least until 50% duty cycle.... then it will decrease again unfortunately.</p><img src="https://community.element14.com/aggbug?PostID=24525&AppID=388&AppType=Weblog&ContentType=0" width="1" height="1">